aLIGO LHO Logbook

H1 SYS

daniel.sigg@LIGO.ORG - posted 14:38, Tuesday 05 September 2017 - last comment - 18:15, Tuesday 05 September 2017(38524)

EY TMDS

Kyle, Gerardo, Daniel

The first (and only) cycle was started around 13:45PM. We reached ~10 torr after about 24 minutes. The flow was around 65 slm, the HV at 200mV rms, and the electrometer readout with a 12Vpk square wave was 15-16Vpp throughout the discharging.

The first ion gun suffered from a HV failure and had to be replaced. We measured around 3-4kΩ resistance at the HV feedthrough (should be several MΩ).

Comments related to this report

kyle.ryan@LIGO.ORG - 18:15, Tuesday 05 September 2017 (38530)

Link

Kyle, Gerardo 

Following the gas/ion admission and before beginning to pump down (Y-end ~10Torr), we isolated and decoupled the Surface Discharge Ionizer from BSC10's door, installed a 2.75" CF blank flange in its place and then "dumped" this small volume of room air into the Y-end vacuum volume.  We are leaving Y-end pumping via the Turbo overnight.  Gerardo and I will leak test the 2.75" blank followed by opening GV18 when we get in in the morning.